The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 1984
Filed:
Jan. 07, 1983
Hiroshi Iijima, Tokyo, JP;
Kunihiko Moriya, Tokyo, JP;
Kazuhito Tate, Kanagawa, JP;
Goro Muroga, Tokyo, JP;
Kazuhiro Yanagida, Kanagawa, JP;
Yoshikazu Nakamura, Kanagawa, JP;
Akiyoshi Inoue, Kanagawa, JP;
Masahiro Higashi, Kanagawa, JP;
Mitsubishi Oil Co., Ltd., Tokyo, JP;
Abstract
A process for producing a pitch which is used as a raw material for producing carbon fibers is disclosed. The process comprises subjecting a petroleum heavy residual oil to hydrogenation treatment in the presence of catalysts, removing a low boiling point fraction of the oil by reduced pressure distillation, subjecting the resulting reduced pressure distillation residual oil to solvent extraction treatment, and carrying out thermal modification of the resulting extraction component. By utilizing the process for producing the pitch it is possible to use a wide variety of different types of oils in order to produce carbon fibers. The carbon fibers produced from the pitch produced according to the disclosed process have desirable characteristics.